Please Help with DAC...

I have a Samsung hd841 el'cheapo cdp if I add a DAC to it will I improove the sound or not, I thought a 200.00 used DAC may help a 150.00 player sound better but I wonder about technology in Samsung VS what will most likely be a slightly to moderately aged DAC, can you guys please tell me what specs I need to focus on such as BITS and such, or if entertaining the thought of a DAC is even worth it? I need to put this DAC thing to bed once and for all, please help!